Modeling nose pads on glasses design
Try the following........
1: Extrude out a couple of the faces.

2: Add a Subdivision modifier.

3: Select the upper edge loop and slide it up towards the next edge loop.
( G G to edge slide ). See screenshot below. Then    repeat for the other edge loop.

4: Select the middle 2 vertices and drag them out a little to form the  curve.

5: After setting all the faces to Smooth Shading, (select all, Face menu &gt; Shade Smooth) enable the Auto Smooth option from the Object Data Properties tab.